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Question: 

A flashlight beam strikes the surface of a pane of glass (n = 1.56) at a $67 ^\circ$ angle to the normal. What is the angle of refraction?

Source: Giancoli, Douglas C., Physics: Principles with Applications, 7th Edition, 2014.

Quick Answer: 

$36^\circ$

Giancoli 7th Edition, Chapter 23, Problem 28

(1:12)

Chapter 23, Problem 28 is solved.

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